Lock.



c. A. MULLER.

LOCK.

APPLICATION FILED JAN-30.1912.

Patented Feb. 29, 1916.

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LOCK.

Specificationof Letters Patent.

Patented Feb. 29, 1916.

Application filed January 30, 1912. Serial. No. .674,256..

torded by the intermediate elements-that is to say, they continue to lockafter thissupport is removed by the elements being destroyed. Moreover, the elements, donotact directly on the tumblers, but upon the ends of projections which extend laterally from the tumblers in a plane whichcrosses Orin-- tersects the plane in which the intermediate elements lie. elements and the tumbler projections are destroyed. the tumblers, which as explained above still continue to lock, are quite inaccessible to pick-locks and the like.

Figures 1, 2 and 4' of the accompanying:

drawing show such a lock in cross-section, partly in longitudinal sectlon and sectionon line A-A respectively while Fig. 3 shows the corresponding key. Figs. 5 16sl iow other constructions. partly 1n. cross-sect on,

and partly in longitudinal section, Fig. 6,,

showing sing e tumblers, Fig 9 being a, s e,

tion on line BB of Fig. 8-, Fig. 14: afrontl elevation of the lock shown in Fig. 13-, and} Fig. 15 showing the corresponding key.

In all the constructions illustrated. the cylinder a rotatable in the casing b, is locked in the usual manner by means of tumblers c of which there can be provided any desired number. In addition to these tumblersthere could be provided further auxiliary tumblers (Z which become operative; only when the locking cylinder a is partly turned, and even in that case only when the tumblers situated in the cylinder, are not accurately a diusted owing to the use of a wrong key or of a skeleton key. In the same way any desired auxiliary recesses 6 can be provided in the casing, which prevent the locking cylinder from further rotation if the tumblers a are not correctly adjusted. The tumblers d and the auxiliary tumblers are provided Thus when the intermediate as usual with springs 7. All these tumblers or locking;parts can be arranged in the cylmders either ina radial or. longitudinal adustablemanner. They aresituated out of reach of-the key-hole. g, and are completely closed off from the latter and inaccessible from the outside, and each of them locks the lock independently. They are operated by a key ofany desired shape (for instance Fig. 3 or Fig. 15) by means of a separate element k which partly projects into the key-hole and transmits the movement of the key to the locking parts. The element It can have the shape of a bar. (Figs. 1, 2, 5, 7, 12, 13, 16) or be constituted by balls (Figs. 10 and 11) or have some other suitable shape. Theelement can also be provided with a projectionz' (Fig. 7) which projects into the key-hole, so that the element itself is protected. Several such elements successively transmitting the movement of the key to the tumblers, could be used (Figs. 134(3). The elements hj can then-also act as locking parts, as in case ofawrong adjustment, they lock together the parts a and b. In case of safes, the element 71. can be of suchrlength thatit projects into the door is (Fig. 16). n this figure, Z is the engagement disk for the sets of bolts of the safe. In this case the cylinder (1 is not turned by the key as in the other constructions, but by hand-oprate mea The tumblers could be provided with partsm (Fig, 6): which do notco'operate in locking but are merely used for operating the elements al The-said parts could however also cooperate in looking (for instance Fig. 8). In all the constructions great security is insured owing to the fact that only the element it can befde'stroyed, while the tumblers themselves are inaccessible from the. key-hole, and continue to lock after the destruction of, the element.

The lateral projections (Z on the tumblers as shownhaye two functions, firstly to prevent the tumblers from falling out of their locking position when the intermediate elements are destroyed, and secondlyto serve as, connecting means between the elements h and the tumblers c and cl.

WVhat I claim as my invention and desire to secure by Letters Patent is 1. In a tumbler lock, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing and having a key-hole, interme diate elements operable by a key and disposed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said intermediate elements, lateral projections on said tumblers which extend at right angles to said tumblers into the path of the intermediate elements, and operate to retain the tumblers in looking position when the intermediate elements are withdrawn or destroyed.

2. In a tumbler lock, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing and having a key-hole, intermediate elements operable by a key and dis posed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said intermediate elements, lateral projections on said tumblers extending at right angles to said tumblers into the path of the intermediate elements, projections on said tumblers adapted to engage shoulders in the recesses of the casing and to retain said tumblers in the recesses.

3. In a tumbler lock, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing, and having a key-hole, intermediate elements operable by a key and disposed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said intermediate elements, lateral projections on said tumblers extending at right angles to said tumblers into the path of the intermediate elements, extensions on said lateral projections, and secondary tumblers adapted to be adjusted thereby, whereby the tumblers continue to lock when the intermediate elements are withdrawn or destroyed.

4. In a tumbler look, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing and having a key-hole, intermediate elements operable by a key, and disposed in parallel recesses, tumblers dispcsed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said intermediate elements, lateral projections on said tumblers. extending at right angles to said tumblers into the path of the intermediate elements, extensions on said lateral projections adapted to act as locking parts, and secondary tumblers adapted to be adjusted thereby, whereby the tumblers continue to look when the intermediate elements are withdrawn or destroyed.

5. In a tumbler lock, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing and having a key-hole, intermediate elements operable by a key and disposed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel. to the plane of the said intermediate elements, lateral projections on said tumblers extending at right angles to said tumblers into the path of the intermediate elements, extra tumblers arranged in secondary recesses in the casing and adapted to lock in case of an attempt to force the lock, and means comprising lateral projections whereby the tumblers continue to lock when the intermediate elements are withdrawn or destroyed.

6. In a tumbler look, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in said casing and having a key-hole, rows of contacting balls operable by a key and'disposed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said rows of balls, and lateral projections on said tumblers into the path of the rows of balls, whereby the tumblers continue to look when the rows of balls are withdrawn or destroyed.

I 7 In a tumbler lock for safes, a cylindrical casing having a plurality of recesses in the inner face thereof, a cylinder rotatably mounted in sail. casing and having a keyhole, intermediate elements operable by a Key passing through the door of the safeand disposed in parallel recesses, tumblers disposed in recesses arranged in a plane laterally displaced from and parallel to the plane of the said intermediate elements, lateral projections on said tumblers extending at right angles to said tumblers into the path of the intermediate elements, whereby the tumblers continue to lock when the intermediate elements are Withdrawn or destroyed. 1 In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL AUGUST MULLER.

Witnesses:

Son-1m MIJLLER, U130 HAASE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

